Abstract：
Conversion of toxic nitroarenes into less toxic aryl amines, which are the most suitable precursors for different types of compounds, is done with various materials which are costly or take more time for this conversion. In this regards, a silica@poly(chitosan-N-isopropylacrylamide-methacrylic acid) Si@P(CS-NIPAM-MAA) Si@P(CNM) core-shell microgel system was synthesized through free radical precipitation polymerization (FRPP) and then fabricated with palladium nanoparticles (Pd NPs) by in situ-reduction method to form Si@Pd-P(CNM) and characterized with XRD, TEM, FTIR, SEM, and EDX. The catalytic efficiency of Si@Pd-P(CNM) hybrid microgels was studied for reduction of 4-nitroaniline (4NiA) under diverse conditions. Different nitroarenes were successfully transformed into their corresponding aryl amines with high yields using the Si@Pd-P(CNM) system as catalyst and NaBH4 as reductant. The Si@Pd-P(CNM) catalyst exhibited remarkable catalytic efficiency and recyclability as well as maintaining its catalytic effectiveness over multiple cycles.
摘要：
将有毒的硝基芳烃转化为毒性较小的芳基胺，它们是不同类型化合物最合适的前体，是用各种昂贵的材料完成的，或者这种转换需要更多的时间。在这方面,通过自由基沉淀聚合（FRPP）合成了二氧化硅@聚（壳聚糖-N-异丙基丙烯酰胺-甲基丙烯酸）Si@P（CS-NIPAM-MAA）Si@P（CNM）核壳微凝胶体系，然后通过原位还原法与钯纳米颗粒（PdNPs）形成Si@Pd-P（CNM），并用XRD表征。TEM,FTIR,SEM,EDX研究了Si@Pd-P（CNM）杂化微凝胶在不同条件下还原4-硝基苯胺（4NiA）的催化效率。以Si@Pd-P（CNM）体系为催化剂，NaBH4为还原剂，成功地将不同的硝基芳烃转化为相应的芳基胺，产率较高。Si@Pd-P(CNM)催化剂表现出显著的催化效率和可回收性,并且在多个循环中保持其催化效率。
